Siemens SINUMERIK 840Di Diagnostic Manual page 760

Overview of Alarms
SIMODRIVE alarms
300786 Axis %1 drive %2 field weakening speed invalid
Parameters: %1 = NC axis number
%2 = Drive number
Definitions: The value in MD 1142: $MD_FIELD_WEAKENING_SPEED (threshold speed for field weakening) is
less than or equal to zero.
The alarm can be reprogrammed in the MD ALARM_REACTION_CHAN_NOREADY (channel not
ready).
Reaction: NC not ready.
The NC switches to follow-up mode.
Channel not ready.
NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Channel not ready.
Remedy: Please inform the authorized personnel/service department.
- For standard motors: Reset the drive (delete the bootfile) and repeat the startup.
- For third-party motors: Check and, if necessary, refer to the motor data sheet to correct MD 1142:
$MD_FIELD_WEAKENING_SPEED (threshold speed for field weakening).
Program Clear alarm with the RESET key in all channels. Restart part program.
Continuation:
300787 Axis %1 drive %2 asynchronous mode: feedforward control gain out of
range
Parameters: %1 = NC axis number
%2 = Drive number
Definitions: If motor inertia and motor nominal torque have been selected unfavorably, the asynchronous motor
feedforward control gain is beyond the range of the internal number format.
The alarm can be reprogrammed in the MD ALARM_REACTION_CHAN_NOREADY (channel not
ready).
Reaction: NC not ready.
The NC switches to follow-up mode.
Channel not ready.
NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Channel not ready.
Remedy: Please inform the authorized personnel/service department.
- Operation without encoder: Reduce the number of encoder lines in MD 1005:
$MD_ENC_RESOL_MOTOR (encoder resolution for motor measuring system), since this has an
impact on the internal number format.
- Optional/additional measure: see operation with encoder
- Operation with encoder: Reduce speed controller cycle MD 1001:
$MD_SPEEDCTRL_CYCLE_TIME (speed controller cycle).
Program Clear alarm with the RESET key in all channels. Restart part program.
Continuation:
2-760
© Siemens AG, 2006. All rights reserved
SINUMERIK, SIMODRIVE Diagnostics Manual (DA), 11/2006 Edition
11/2006